diff --git a/store/memory/store.go b/store/memory/store.go
index e111ec4..a68e6c7 100644
--- a/store/memory/store.go
+++ b/store/memory/store.go
@@ -4,30 +4,30 @@
 package store
 
 import (
-  "fmt"
-  "sync"
+	"fmt"
+	"sync"
 )
 
 func New() *Store {
-  return &Store{}
+	return &Store{}
 }
 
 type Store struct {
-  sync.Map
+	sync.Map
 }
 
 func (c *Store) SetCheckpoint(streamName, shardID, sequenceNumber string) error {
-  if sequenceNumber == "" {
-    return fmt.Errorf("sequence number should not be empty")
-  }
-  c.Store(streamName+":"+shardID, sequenceNumber)
-  return nil
+	if sequenceNumber == "" {
+		return fmt.Errorf("sequence number should not be empty")
+	}
+	c.Store(streamName+":"+shardID, sequenceNumber)
+	return nil
 }
 
 func (c *Store) GetCheckpoint(streamName, shardID string) (string, error) {
-  val, ok := c.Load(streamName + ":" + shardID)
-  if !ok {
-    return "", nil
-  }
-  return val.(string), nil
+	val, ok := c.Load(streamName + ":" + shardID)
+	if !ok {
+		return "", nil
+	}
+	return val.(string), nil
 }
diff --git a/store/memory/store_test.go b/store/memory/store_test.go
index 6b05bc7..5eb553c 100644
--- a/store/memory/store_test.go
+++ b/store/memory/store_test.go
@@ -1,30 +1,30 @@
 package store
 
 import (
-  "testing"
+	"testing"
 )
 
 func Test_CheckpointLifecycle(t *testing.T) {
-  c := New()
+	c := New()
 
-  // set
-  c.SetCheckpoint("streamName", "shardID", "testSeqNum")
+	// set
+	c.SetCheckpoint("streamName", "shardID", "testSeqNum")
 
-  // get
-  val, err := c.GetCheckpoint("streamName", "shardID")
-  if err != nil  {
-    t.Fatalf("get checkpoint error: %v", err)
-  }
-  if val != "testSeqNum" {
-    t.Fatalf("checkpoint exists expected %s, got %s", "testSeqNum", val)
-  }
+	// get
+	val, err := c.GetCheckpoint("streamName", "shardID")
+	if err != nil {
+		t.Fatalf("get checkpoint error: %v", err)
+	}
+	if val != "testSeqNum" {
+		t.Fatalf("checkpoint exists expected %s, got %s", "testSeqNum", val)
+	}
 }
 
 func Test_SetEmptySeqNum(t *testing.T) {
-  c := New()
+	c := New()
 
-  err := c.SetCheckpoint("streamName", "shardID", "")
-  if err == nil || err.Error() != "sequence number should not be empty" {
-    t.Fatalf("should not allow empty sequence number")
-  }
+	err := c.SetCheckpoint("streamName", "shardID", "")
+	if err == nil || err.Error() != "sequence number should not be empty" {
+		t.Fatalf("should not allow empty sequence number")
+	}
 }